So I was wondering for a long while on how to fit Flurry Heart into the cornerverse-mlp universe, considering the Lore surrounding her was very contradictory. I’ve decided that I like her enough to have her put into the world, literally. Flurry Heart is the Princess of Time, Space, and Dimensions, able to travel between Worlds and Timelines at will, helping those she can. I don’t know, her big wings are her most prominent feature, and for some reason I associate Wings with Dimensional travel Kicks several volumes of CLAMP’s Tsubasa Reservoir Chronicle under my bed 
So yes, while Gleaming Heart takes Flurry’s place in Cornerverse-MLP’s continuity, Flurry can still show up there. Also, she’s about 19 here, and has been adventuring for quite a while.